2121656940

Names of 2121656940

• Cardinal: 2121656940 can be written as Two billion, one hundred twenty-one million, six hundred fifty-six thousand, nine hundred forty.

Scientific notation

• Scientific notation: 2.12165694 × 10⁹

Factors of 2121656940

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 906714

Divisors of 2121656940

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 13 15 18 20 26 30 36 39 45 52 60 65 78 90 117 130 156 180 195 234 260 390 468 585 780 1170 2340 906691 1813382 2720073 3626764 4533455 5440146 8160219 9066910 10880292 11786983 13600365 16320438 18133820 23573966 27200730 32640876 35360949 40801095 47147932 54401460 58934915 70721898 81602190 106082847 117869830 141443796 163204380 176804745 212165694 235739660 353609490 424331388 530414235 707218980 1060828470 2121656940
• Sum of all divisors σ(n): 6930753648
• Sum of proper divisors (its aliquot sum) s(n): 4809096708
• 2121656940 is an abundant number, because the sum of its proper divisors (4809096708) is greater than itself. Its abundance is 2687439768

Bases of 2121656940

• Binary: 1111110011101011110101001101100₂
• Hexadecimal: 0x7E75EA6C
• Base-36: Z36GZ0

Squares and roots of 2121656940

• 2121656940 squared (2121656940²) is 4501428171050163600
• 2121656940 cubed (2121656940³) is 9550486319020086690075384000
• The square root of 2121656940 is 46061.4474370921
• The cube root of 2121656940 is 1284.9662494227

Scales and comparisons

• 2,121,656,940 seconds is equal to 67 years, 24 weeks, 5 hours, 9 minutes.
• To count from 1 to 2,121,656,940 would take you about one hundred thirty-four years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 2121656940 cubic inches would be around 107.1 feet tall.

Recreational maths with 2121656940

• 2121656940 backwards is 0496561212
• 2121656940 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 2121656940's digits is 36
• More coming soon!